Horton

Re: speeding up planning with partitions

Alvaro Herrera <alvherre@2ndquadrant.com>

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From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: David Rowley <david.rowley@2ndquadrant.com>
Cc: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>, "Imai, Yoshikazu" <imai.yoshikazu@jp.fujitsu.com>, Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2019-02-01T09:51:58Z
Lists: pgsql-hackers 
On 2019-Jan-31, David Rowley wrote:

> On Tue, 29 Jan 2019 at 22:32, Amit Langote
> <Langote_Amit_f8@lab.ntt.co.jp> wrote:
> > Attached updated patches.
> 
> I think we could make the 0001 patch a bit smaller if we were to apply
> the attached first.
> 
> Details in the commit message.
> 
> What do you think?

Amit didn't say what he thinks, but I think it looks good and the
rationale for it makes sense, so I pushed it.  I only amended some
comments a little bit.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Commits

  1. Clean up handling of constraint_exclusion and enable_partition_pruning.

  2. Add test case exercising formerly-unreached code in inheritance_planner.

  3. Speed up planning when partitions can be pruned at plan time.

  4. Avoid crash in partitionwise join planning under GEQO.

  5. Avoid passing query tlist around separately from root->processed_tlist.

  6. Build "other rels" of appendrel baserels in a separate step.

  7. Get rid of duplicate child RTE for a partitioned table.

  8. Rearrange make_partitionedrel_pruneinfo to avoid work when we can't prune.

  9. Don't copy PartitionBoundInfo in set_relation_partition_info.

  10. Move building of child base quals out into a new function

  11. Reorganize planner code moved in b60c39759908

  12. Move inheritance expansion code into its own file

  13. Fix inherited UPDATE/DELETE with UNION ALL subqueries.

  14. Rearrange planner to save the whole PlannerInfo (subroot) for a subquery.